Power supply module + STM32 core module, connect the power supply, STM32 can work, then we can design the desired board according to the function of the pin.Introduction to Path Planning in Robotics ASM1117-3.3 turns the voltage out to 3.3V, and the LED shows whether it is connected to the power supply. The miniUSB is powered by 5V, ON OFF is a switch to control whether the power supply is connected or not, 0.5A is a fuse, if it exceeds this current, it will be disconnected, and if it is lower than this current, it will automatically recover.

Now if the chip is powered on, the chip can work normally, but the chip has no design function, we can choose the pins and design the board we want power module It can not only save cost, but also save board area. If the RTC function is not used, this part of the circuit does not need to be soldered or even designed. The 32.768KHz crystal oscillator circuit is for the RTC. OSC32_IN and OSC32_OUT are connected to 32.768MHz crystal oscillator OSC_IN and OSC_OUT should be connected to 8MHz crystal oscillator VSSA is directly grounded, and VDDA is filtered by several capacitors

VSSA: Negative pole of analog voltage, groundedįor VDD, each is directly connected to VCC3.3, VSS is grounded, and VDD is coupled with a filter capacitor.

VSS: Negative pole of digital voltage, grounded.

VDD: the positive pole of the digital voltage.

Here we take STM32F103C8T6 as the column, first put the schematic diagram of the chip into the schematic diagramįor STM32, several modules are the core, namely power supply, crystal oscillator, reset, download port, BOOT startup mode Connect external powerįrom the STM32 above we can see that there are VDDA, VSSA, VDD, VSS

Stm32f103c8t6 altium library